Need to be able to search a file and delete any line that contains the word "qmail" and the line below it:

# added 61.171.5.61 on 10/27/06 08:14:01 with comment: {bfd.qmail}
61.171.5.61
# added 85.105.163.31 on 10/27/06 08:18:01 with comment: {bfd.qmail}
85.105.163.31
# added 151.50.197.175 on 10/27/06 08:18:02 with comment: {bfd.qmail}
151.50.197.175
# added 200.180.102.101 on 10/27/06 08:19:01 with comment: {bfd.qmail}
200.180.102.101